KPMI White Diamond Intake Valve - 1.630 Oversized - Harley Milwaukee-Eight
About KPMI
Kibblewhite Precision Machining supplies valves, valve springs, guides and complete top-end kits used by professional V-twin engine builders. Its black diamond valves and spring kits are a standard specification on high-lift cam builds.
The KPMI White Diamond intake valve for Milwaukee-Eight (M8) engines is engineered for performance builds, featuring an oversized 1.630 inch stem diameter. This valve is designed to complement high-lift cam profiles, delivering enhanced flow characteristics while maintaining OEM-level quality.
Why riders pick this
- Oversized 1.630 inch stem diameter
- White Diamond thermal-resistant coating
- Designed for high-lift M8 cam applications
- Optimized flow characteristics for performance builds
When pushing the limits of your Milwaukee-Eight, every component counts. This KPMI intake valve is built to handle the demands of aggressive cam profiles, ensuring your engine can breathe efficiently at higher RPMs and increased lift. The White Diamond thermal-resistant coating adds an extra layer of durability and heat management.
Built for High-Performance M8 Builds
- 1.630 inch oversized stem diameter for performance applications
- White Diamond thermal-resistant coating enhances durability and heat dissipation
- Engineered for compatibility with high-lift Milwaukee-Eight cam profiles
- Designed to maintain optimal flow characteristics for improved engine efficiency
Upgrade Your Milwaukee-Eight Valve Train
This oversized intake valve is a critical component for those looking to maximize their M8 engine's potential. It's ideal for custom builds and stage upgrades that involve aggressive cam swaps, where increased airflow is paramount. Always confirm compatibility with your cylinder head and cam specifications before installation to ensure proper fitment and optimal performance.
Specifications
- Brand: KPMI
- Manufacturer Part #: 20-21009H
- Stem Diameter: 1.630 in
- Length: 3.5 in
- Weight: 0.2 lbs
Common questions
Will this oversized valve fit my stock M8 cylinder head?
This valve features an oversized 1.630 inch stem diameter and is generally intended for cylinder heads that have been machined to accept larger valves. Stock M8 heads may require modification.
Is this valve suitable for stock cam profiles?
This valve is engineered specifically for high-lift cam applications. While it may physically fit, it's best to verify compatibility with your cam manufacturer for stock-lift setups to ensure optimal performance.
What is the benefit of the White Diamond coating?
The White Diamond coating is a thermal-resistant surface treatment that improves heat dissipation and extends valve life, especially beneficial under the increased stress of aggressive cam profiles and high-performance operation.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | KPMI |
| TYPE | Engine |
| SKU | 191-17042 |
| WEIGHT | 0.2 lb |
